6445764427 has 2 divisors, whose sum is σ = 6445764428. Its totient is φ = 6445764426.

The previous prime is 6445764407. The next prime is 6445764463. The reversal of 6445764427 is 7244675446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6445764427 is a prime.

It is not a weakly prime, because it can be changed into another prime (6445764407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222882213 + 3222882214.

It is an arithmetic number, because the mean of its divisors is an integer number (3222882214).

Almost surely, 2^6445764427 is an apocalyptic number.

6445764427 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445764427 is an equidigital number, since it uses as much as digits as its factorization.

6445764427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 49.

The square root of 6445764427 is about 80285.5181648596. The cubic root of 6445764427 is about 1861.0504363488.

The spelling of 6445764427 in words is "six billion, four hundred forty-five million, seven hundred sixty-four thousand, four hundred twenty-seven".